Objective - » Since Desmond is one of the Main Cast Characters, and the episodes were he was the Main character was so successful, the producers decided to build one more episode about him, since he was impossible to put a episode about him later in the season. So, you have is flashbacks and mission on the Island as the primary focus and the Kate subplot reaction about Jack. Good material or so it seemed.
Flashbacks -» Pure from Boring Kingdom. The beginning can fail to catch your attention. The complication phase is inexistence, the climax is not there and you simple don´t care for an ending.
Event on The Island -» Just wasting your time. The beginning was strong, but then, the complication phase was about Desmond deciding to save Charlie or not. I didn´t Catch the Climax, and the ending does not justify the whole structure of this episode.
Kate Reaction -» Kate subplot was really strange. Her slut reaction to Sawyer was something that does not make sense to me. In the Middle, what was cool was seeing Sawyer reaction, when he learn why Kate did it. Maybe this was the Climax of this subplot, because Sawyer made some minor jokes that is funny anyway.
1 - Plot Holes: Silver. Didn´t Noticed but I didn´t care either. The only thing here that is strange is Kate Slut reaction, which is something that does not make any sense to me.
2 - Time and Scenes Management: Bad. Showing us what would happen in the beginning of this episode was a bad idea from the writers, since you wait too long for the part you want to see and with the flashbacks, this became very boring.
3 - Surprises/Twist/Shocks/Cliffhangers: The beginning can get you by surprise, this was well done, the ending is a surprise, but not very interesting yet.
4 - Action: None, but wasn´t an episode for this.
5 - Funny: Bronze. The Ghost Story Scene made by Jin. Maybe some comments between Hugo and Charlie.
6 - Drama: .Bronze. Almost Irrelevant. The Scene with his loved one was nice.
7 - Tension/Fear: Weak. Almost inexistent.
8 - Excitement Level (curiosity/Mystery/Doubt/Revelations: Nearly Bronze - . Maybe you want to know what happens with Charlie, but when the episode begins to be boring, it is difficult to care and is impossible to him to die, only if was Charlie flashback in game, like many other character like Ana Lucia, Shannon and Eko maybe this would become true.
Overall, this episode was unnecessary, maybe the ending, but the entire episode is about wasting time and does not have the ability to entertain for too long, only if you are a super fan that rate 10 or 9 to every episode.